Skin age identifier



FIG. 1 is a perspective view of a skin age identifier;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines depict portions of the skin age identifier that form no part of the claimed design. 

CLAIM The ornamental design for skin age identifier, as shown and described. 